Theorem dmv 5872

Description: The domain of the universe is the universe. (Contributed by NM, 8-Aug-2003.)

Assertion

Ref	Expression
dmv	⊢ dom V = V

Proof of Theorem dmv

Step	Hyp	Ref	Expression
1		ssv 3959	. 2 ⊢ dom V ⊆ V
2		dmi 5871	. . 3 ⊢ dom I = V
3		ssv 3959	. . . 4 ⊢ I ⊆ V
4		dmss 5852	. . . 4 ⊢ ( I ⊆ V → dom I ⊆ dom V)
5	3, 4	ax-mp 5	. . 3 ⊢ dom I ⊆ dom V
6	2, 5	eqsstrri 3982	. 2 ⊢ V ⊆ dom V
7	1, 6	eqssi 3951	1 ⊢ dom V = V

Syntax hints:   = wceq 1542  Vcvv 3441   ⊆ wss 3902   I cid 5519  dom cdm 5625

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-sep 5242  ax-nul 5252  ax-pr 5378

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3062  df-rab 3401  df-v 3443  df-dif 3905  df-un 3907  df-ss 3919  df-nul 4287  df-if 4481  df-sn 4582  df-pr 4584  df-op 4588  df-br 5100  df-opab 5162  df-id 5520  df-xp 5631  df-rel 5632  df-dm 5635

This theorem is referenced by: (None)